Don't Olds have an issue if there is too much cooling water pressure, it can push water into the oil?
Something about the water passage is too close to the edge where it can get into the oil.
When I had my engine rebuilt, I ended up with a milkshake. I closed the water intake valve a little and have not had a problem since.
I know this probably has GT shaking his head about reducing the inlet water. But that's for another thread.

But my point is, can too much water pressure push past a gasket, in a certain area, that is specific to an Olds?